[ros-diffs] [hbirr] 14506: - Changed the calculation of the current sector count to read or write from both sides of a floppy in one step.

[hbirr at svn.reactos.com]

- Changed the calculation of the current sector count to read or write
from both sides of a floppy in one step.  
- Set the EOT sector always to the last sector of a floppy.
Modified: trunk/reactos/drivers/storage/floppy/readwrite.c
  _____  

Modified: trunk/reactos/drivers/storage/floppy/readwrite.c
--- trunk/reactos/drivers/storage/floppy/readwrite.c	2005-04-05
17:07:56 UTC (rev 14505)
+++ trunk/reactos/drivers/storage/floppy/readwrite.c	2005-04-05
17:12:52 UTC (rev 14506)
@@ -654,10 +654,10 @@

       KdPrint(("floppy: ReadWritePassive(): computing number of sectors
to transfer (StartSector 0x%x): ", StartSector));
 
       /* 1-based sector number */
-      if( ((DriveInfo->DiskGeometry.SectorsPerTrack - StartSector) + 1)
< 
+      if( (((DriveInfo->DiskGeometry.TracksPerCylinder - Head) *
DriveInfo->DiskGeometry.SectorsPerTrack - StartSector) + 1 ) < 
 	  (Length - TransferByteOffset) /
DriveInfo->DiskGeometry.BytesPerSector)
 	{
-	  CurrentTransferSectors =
(UCHAR)(DriveInfo->DiskGeometry.SectorsPerTrack - StartSector) + 1;
+	  CurrentTransferSectors =
(UCHAR)((DriveInfo->DiskGeometry.TracksPerCylinder - Head) *
DriveInfo->DiskGeometry.SectorsPerTrack - StartSector) + 1;
 	}
       else
 	{
@@ -703,7 +703,7 @@
 
       /* Issue the read/write command to the controller.  Note that it
expects the opposite of WriteToDevice. */ 
       if(HwReadWriteData(DriveInfo->ControllerInfo, !WriteToDevice,
DriveInfo->UnitNumber, Cylinder, Head, StartSector, 
-			 DriveInfo->BytesPerSectorCode, StartSector +
CurrentTransferSectors, 0, 0xff) != STATUS_SUCCESS)
+			 DriveInfo->BytesPerSectorCode,
DriveInfo->DiskGeometry.SectorsPerTrack, 0, 0xff) != STATUS_SUCCESS)
 	{
 	  KdPrint(("floppy: ReadWritePassive(): HwReadWriteData returned
failure; unable to read; completing with STATUS_UNSUCCESSFUL\n"));
 
RWFreeAdapterChannel(DriveInfo->ControllerInfo->AdapterObject);
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